Collision-induced gain enhancement
Abstract
An alternative method for obtaining laser emissions through a transient dipole moment between the metastable state and a lower level induced by means of a collision, allowing emission from the original atom or molecule, is described. Collision-induced emission is generated by long-range electrostatic forces such as a dipole-dipole interaction and avoids collisional energy losses. An analysis is presented of transient dipole moments and induced gain, noting that the gain peaks off-resonance and declines exponentially. Applications to He and I are considered, and it is shown that gain increases with gas density, and that efficiency is enhanced by decreasing the emitter densities. The collision-induced gain is demonstrated to be related to the Raman scattering cross section.
- Publication:
-
Lasers 1980; Proceedings of the International Conference
- Pub Date:
- 1981
- Bibcode:
- 1981lase.conf..717R
- Keywords:
-
- Atomic Collisions;
- Electric Moments;
- Laser Outputs;
- Lasing;
- Molecular Collisions;
- Power Gain;
- Energy Conversion Efficiency;
- Energy Dissipation;
- Gas Density;
- Gas Lasers;
- Helium;
- Iodine Lasers;
- Metastable State;
- Raman Spectra;
- Lasers and Masers